Error on the recovered parameters. Top panels: circles represent the separation and contrasts of the injected signature, and each column represents one flux regime. Bottom panels: error on the estimated angle θ. The parameters ρ and c of each injected signature are represented as coloured circles on the top panels, while θ is fixed at 315° for all signatures. The same colour code is used for every panel, with each colour corresponding to an injected signature. Each dot on the top panel represents the parameters estimated for a single realisation of the noise.